Publications [#229876] of Stephen Nowicki

Journal Articles

1. Nowicki, S; Capranica, RR (1986). Bilateral syringeal interaction in vocal production of an oscine bird sound.. Science (New York, N.Y.), 231(4743), 1297-1299. [doi]
   (last updated on 2024/11/06)

   Abstract:
   The vocal organ, or syrinx, of oscine birds has two parts, each of which has generally been presumed to operate independently of the other. A significant counter-example is now demonstrated in the production of a common vocalization by the black-capped chickadee (Parus atricapillus), in which the two acoustic sources interact in a nonlinear fashion. This bird produces a sound with multiple frequency components that are heterodyne products resulting from cross-modulation between two signals, thus providing evidence that avian phonation can involve cooperative coupling between the two syringeal sources.